Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page xxi
... greater . General description of a comet . Comets with- out tails , or with more than one . Their extreme tenuity . Their probable structure . Motions conformable to the law of gravity . Actual dimensions of comets . Periodical return ...
... greater . General description of a comet . Comets with- out tails , or with more than one . Their extreme tenuity . Their probable structure . Motions conformable to the law of gravity . Actual dimensions of comets . Periodical return ...
Page xxiv
... greater of them . The zodiacal light . Shooting stars . Speculations on the dynamical origin of the Sun's heat 633 PART IV . OF THE ACCOUNT OF TIME . CHAPTER XVIII . Natural units of time . Relation of the sidereal to the solar day ...
... greater of them . The zodiacal light . Shooting stars . Speculations on the dynamical origin of the Sun's heat 633 PART IV . OF THE ACCOUNT OF TIME . CHAPTER XVIII . Natural units of time . Relation of the sidereal to the solar day ...
Page 2
... greater and far more curiously furnished than the earth he inhabits , as there are also others less so ; and the stars them- selves , properly so called , which to ordinary apprehension present only lucid sparks or brilliant atoms , are ...
... greater and far more curiously furnished than the earth he inhabits , as there are also others less so ; and the stars them- selves , properly so called , which to ordinary apprehension present only lucid sparks or brilliant atoms , are ...
Page 20
... greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its consistency with observations of a different kind , and on a larger ...
... greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its consistency with observations of a different kind , and on a larger ...
Page 28
... greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sde ba , continually more and more concave downwards , and will reach the earth , not at A , but ...
... greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sde ba , continually more and more concave downwards , and will reach the earth , not at A , but ...
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amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination increase inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena planet planetary pole portion position precession precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible whole zenith